Chuck



Jan. so, 1923K 1,443,651

R. F. RUNGE.

CHUCK. FlLED JULY 22, T921.

ya @wom/ms Patented Jan. 30, 1923.

Unir-an s'rr [sy PATENT; oservice-Ef.,

ROBERT P. EUNGE, or PHILADELPHIA, PENNSYLVANIA, Ass'reNon To THE HEss- `Barzani* MANUPACTURING. COMPANY, A CORPORATION. 0E DELAWARE.

. CHUCK. i

Application filed `l'uly 2.2, 1921. Serial. No. SGY.

TV al?, ywhomv t may conc-em:

Be it known that I, Bonner ll. f turIGE,` a. citizen. of the United States, residing at Philadelphia, inthe county of Philadelphia and. State of Pennsylvania. have invented certain. new anduseful Improvements in Chucks, of which the following is a specification, reference being had therein, to thev proved features of constructionl and arrangement ofA the parts which will be fully set forth. in the description to follow, and the` novel` partsv thereof designatedV in the appended claims. d

linvl the accompanying drawings: Fig. 1 is a top plan view of a chuck having my invention embodied therein.

Fig.. 2 is a sectional elevation of the same on. the line aa of Fig. 1, showing a work piece held: by the chuck. *i

Referring to the drawings: My improved chuck is designed particularly for holding` work pieces of annular or ring-like form such for instance as the inner. andI outer ringsof anti-friction bearings. andthe form and construction ofthe chuck is such that while the ring will be held: sothat the operating tool or tools mayact onv both the interior and exterior of the ring, the latterl may be rapidly rotated. The. Preferredv construction for accomplishing this result and which construction is shown by way of example in the accomf panyingdrawing, comprises a fixed support or frame 1` having` a horizontal bearing openingtherein in'which is mounted a spindle. 2 adapted to'be rotated-by any suitable means. Th-espindle has threaded onit a collar 3 which abuts at its rear end against an. annular' shoulder 4, on the spindle and Whh. at its.` front end has Vscrew-ed therein and.fastened fixedly thereto, an annular! e'x'f tension, 5' of the collarfwhoh. GXPXISOI' C'O'T* stitutes `a seat for the. work pice AV to .be operated' on, an,d.,.isfrotatable with the spindie.L Akixed cylindrical casing 6 'extends horizontally from the frame' 1 'and` sui-, round'sand is s aced lfromv thel col-lar 3 and 1s provided on its end With an!l annular outwardly projecting shoulder 6a' the ,purpose o f which will presently appear. 7j, desigi'. nates the clamping jaw ofthe chuck, consisting of a jaw proper 8 adapted to engage the work and hold it against the work seat,

and a, body or frame' portion 9 which carries the jaw proper and which-is so susf tainedf by the cylindrical casi-ng 6, that it` may` be moved in the direction ofthe axis off rotation of the spindle so as to` carry the jaw proper to and from the work seat. TheV body portion 9 of the jaw isy formed with` a neck 10 which surrounds and isspacedfrom the cylindrical casing 6', and receives support at its forward endv from the` shoulder 6Z1 around which it slidingly fits. Rearw'ard of theshoulder the `neck receives sup'- port from a sleeve 11 loosely surrounding and supported by the fixed casing @and lo cated within the neck and movable circum@ ferentia'lly thereof. rl`his sleeve constitutes the `actuating member for the clamping jaw and is so operatively connectedwith the"` neck portion ofl the jaw, asy will laterbe devscribed in detail, thatwhen moved circumfferentially, the jaw will be caused to move to and' from the work seat.

The frame or body portion of thev clamp-4Y ing jaw thus mounted, while capable of a movement axially of the .chuck so as to cause the aw proper to move to and' friom the work seat, is held from circumferential movement. Thisis eected in the Vpresent instanceby means of a linger 12 projecting radially from the body portion of 'the clamping jaw and extending loosely into a slot-13 extending through ahorizyontal arm 14 extendingforwardly from the frame 1. 4

The jaw proper S'isin the form of a rln'g facing the work seat 5 and" isloosely mounti-A ed within" an annular frame'y 16' iixed to the ends of two'parallel armsl? extendingI for-M Wardly" .at insti-Rally Opposite Pelvis; froml the neck 1 0, whereby the jawproper isl movable" circumferentially relatively to; the body portion of 'the' jaw in order that; 1tl p Will. ITOlJaB with, thef Work' lthi/"lien, .Qlgag-,Qdj therewith in' lxlfmpiistle samefpnthefwolgkf seas: ne er' proper Sie' pfeeeb1yfder11o CAD tachably connected with a ring 18 by means of screws 19, and between the ring 18 and annular frame 16, a combined radial and thrust bearing is applied in order to relieve the friction between the jaw proper and the relatively fixed annular frame. This bearing may be of any appropriate form and construction which will answer the objects in view, but l prefer to adopt the form shown in Fig. 2 wherein it will be seen that a casing ring 21 is clamped against a shoulder 22 on the `annular frame by means of a nut 23 screwed in said frame, and a second casing ring 24 is clamped against a shoulder 25 on Vthe ring 18 by means of a nut 26 screwed into the ring 18. These casing rings arel formed with axial and radial portions which respectively face each other and constitute opposing ra-ceways between which a series of rolling elements in the form of bearing balls 27 are located, thus giving axial and radial support to the jaw proper while permitting the same to move circumferentially relatively to the body portion of the jaw with a minimum of friction. 'The nut 26 extends radially beyond the radial portion of the casing ring 21 so as to overlap the same, the result being that when the body of the clamping jawl is moved in a direction to release the work, the radial portion of the ring 21 engaging the overlapping portion of the nut 26, will carry the jaw proper with it and away from the work seat; and when the body of the jaw is moved in the opposite direction to clamp the work, the radial portion of the casing ring 21 will engage the balls and cause them in turn to engage the radial portion of casing ring 24, thus carrying the jaw proper towards the work seat.

The movement of the clamping jaw to and from the work seat by the jaw actuating member or sleeve 11 is effected through the medium of two lugs in the form of rollers 2S mounted on pins 29 projecting Yfrom the sleeve at diametrically opposite points and engaging respectively in cani slots 30 formed in the neck 10 or" the body portion of the jaw at opposite sides. These cam slots extend at an angle relative to the path of circumferential movement of the rollers, and are arranged at opposite angles to each other, the arrangement being such that when the sleeve is turned circumferentially in the direction of the arrow in Fig. 1, which may be conveniently effected by a handle 31 connected with the sleeve and eX- tending outwardly through one of the slots,

`the rollers engaging .the rear cain walls of the slots will positively` shift the body of the jaw yinwardly towards the work seat, whichwill cause the jaw proper to engage and clamp the posite direction, the rollers engaging the work piece; and when ther ,sleeve 1s shifted circumferentially in the opopposite cam walls of the slots, will cause the jaw to be positively moved in the opposite direction and release the work piece. l propose however to combine with this posi,-

tive acting means, additional jaw' actuating means which will act preferably with an impositive or yielding pressure, and will function to forcethejaw proper against the work piece with a relatively light pressure ing that the work piece is in proper cen-l tered relation to the axis of rotation of the work seat. ln the present instance the impositivo acting means is in the forni of two tension springs 32, arranged at diametrically opposite points relative to the neck of the jaw, the rear ends of which springs are connected with the fixed framing 1 whence they extend axially and have their forward ends connected with pins 33 projectingoutwardly from the neck 10 at points forward of the slots therein. rIhe tendency of the springs is to urge the clamping jaw reai'- waid y so as to carry the jaw proper towards the work seat, and a play or lost motion of the jaw relative to the rollers is provided by enlarging the cam slots locally as at 34, whereby the springs are enabled to force the jaw against the work piece independently of the positive clamping action brought about by the movement of the rollers in the cam slots as heretofore described.

In the position of the parte shown in Fig. l, the rollers are seated in the enlarged p0rtions of the slots, and the springs are now free to draw the jaw inwardly and engage the jaw proper against the work with yielding pressure. ln this position of the parts the centering operation of the work piece may be eiiected as described, and when it has been brought to the proper center. thev handlel is moved upwardly, thereby carrying the rollers against the rear cam walls of the cani slots and causing the jaw to positively and more firmly clamp the work piece for such operations as it may be desired to perform thereon. When the work piece is to be released, the handle is moved in the opposite direction, thereby forcing the rollers against the opposite rain walls of the slots and positively moving the jaw outwardly away from the work seat and stretchn ing the springs and placing them under tension., the rollers in this action passing beyond the enlarged portions of the slots and occupying the positions showndottedl lines in Fig. l; VViththe yaw properhthusu the work piece'through'the opening `inr the center of the ring; and due to-the supportV of the annular frame lbby'thel oppositely disposed' armsprojectinggforwardly from the neck 10,' access may be hadthrougli the: laterali openings between said arms and-between the end ofvv the neckand` said vany nular frame, to the exterior of: the work so thatin the case of'casing-rings for bearings for instance, the grinding''wheelsy or otherA tools4 may be presented-to thev ring concur-- rently for action on thev boreA and on the eX teriorof' the same.

It will be observed from the construction described that` the movable clampingjaw is mounted directlyI upon landy is-si1p ported by the forward end of theframe or support in which the rotary spindle carry* ing the work seat is mounted, thus bringing thesaidparts in close proximity to each other and thereby preventing independent' vibrations ofthe same.- Y

In the foregoing description and accom` panyingdrawings I have set forth my invention in the 'particular detailed? form which I 'prefer to adoptl an'd'which in practice has been found*` to 'answerto a` satisfactory degree the ends to beattained.l ITtwillv be manifest liowevertliat these-details` mav be variously changed and modified without departing from the spirit of the invention; andfurther it will? be understood that. the invention is not limitedi to any-'par-`v ticular form' or construction ofthe partsexf cept in so far as such limitationsarefspeci# ed in the claims. v

Having. thus described my invention, what I claim is :I 1

l'. In'a chuck, the combination/cfavvorlrsea-t, a clamping jaw movablet'o and!l from the work-seat', a circumfe'rentially; movable jaw actuating memberadaptedi to positively move the jawl toward thev work seat, said" jaw being movable toward the work.. seat` independently of the actuating n'1e1nber,'and

means acting. on the jaw` and operating to.'

move the'same independently.4 p I 2. Iln. a chuck, the 'combination ofy a: worksea't, a clamping jawl movable to and! from the work seat, a circumferentially mov-able.

Ajawactuating` member adapted to positively move theljawf toward the work seat,

said jaw being` movable towardthe work' seat independently'of lthe actuating member, and aspring acting on the jaw andoperab ing-to move thesameindependently:

' 3. In-afchuck, theA Combination of a work seat, a clampingjawy movableto and from the work seat, said jaw being provided with ar cam surface extending angularly relative to the movement of the jaw, a circumferentially movable jaw actuating memben engaging saidA c am ysurface vto positivelyI move the jaw towardthe work seat, said jaw being mov-able toward the work seat independently oftheactuati-ng member, and meansactingon the to move the same independently.

4.' In a chuck, the combination of a workseat,a' clampingjaw movableto and from the workseat, saidj aw being providedwith a cam surface extending angularly relative to the movement of the Jaw, aA circum ferentially; movable yawactuating member engaging said cam surface to positively move the'jaw toward-the Work seat, saidj'aw being movablev toward the' worlrseatl independently of the actuatingvfmember, `and a;

spring actingon the jaw to move theI same independently.

5; In achuck, the rcombination ofj'a seat", a clamping jaw movable' to and yfrom the work seat-,fand provided with' a cam'islot! -extendingangularly in'relationto the. path o f movement of the jaw, a circumferentially movable actuating member engaging in' said-slot to positively move the jaW,sai`d' jawv being movable towardf the 4Work seat independently-pff the f actuating member, and

a' spring acting. on'the jaw tomove the same independently.

6. In a chuck, the combinationA of' awworkseat,- a.; clamping'jaw movabletoandf from theV Work seat, y said jaw provided 'with a'ca'm vslot extending angularlywith reference to the pa'th-,ofmovement of thejavv,` ajaw actuatin'g member movable oircumferentia-lly and provided' Withalugtting between the' walls1 of the slot, said slot'being widened' l'ocally toper-mitfcf a movement kof the jaw toward the worl'tl seat independently of! the 1ug,ran'd'meansacting'on. the jaw'- andY tendngto move tliefsame independently.

7:.- In a chuck, the combination cfa fixed' support, ai Work seat, a clamping -javvy sustained by the ixedf support andE movable tov and from' the Worleseatj, said' clamping'jaw being provided:i with a cylindrical neck surrounding the fixed support and saidv neck vbeingprovidedwith a cam surface extending angularly in relation to the path of move-ly ment of the jaw, a jaw actuatingv member comprising sleeve` surrounding' the fixed supportand movablel circumferentiallytlfl'ereofi and?y a1- projeoting lug' engagingthe# cam surface, whereby the circumferential movement of the actuating member will move the clamping jaw to and from the work seat, said jaw being movable toward the Work seat independently of the lug, and a spring acting7 on the clamping jaw and tending to more the same independently.

8. In a chuck, the combination of a fixed support, a work seat adapted to be rotated relatively to said support, a work vclamping jaw comprising a body portion sustained by the iixed support and movable relatively thereto in the direction of the axis ot rotation, and a jaw proper sustained by and movable `with the body portion, and rotatable relatively there to about said axis of rotation, and an actuating member for said clamping jaw operable to move the same.

9. ln a chuck, the combination of a rotatable work seat, a work clamping jaw comprising a non-rotatable body portion movable in the direction of the axis of rotation and a jaw proper movable axially with said body portion and rotatable relatively thereto about said axis of rotation and adapted to engage the work on the seat, and an actuating member for the clamping jaw operable to move the same inthe direction of said axis.

10. In a chuck, the combination ot' a fixed supporting means, a work seat rotatable relatively thereto, a work clamping jaw comprising a body portion sustained by the supporting means and' movable relatively thereto in the direction of said axis, said body portion being held against circumferential movement and a jaw proper sustained by and movable with the body portion and movable and rotatable relatively thereto around said axis, and a jaw actuating member engagingr the body portion of the jaw to move the same axially.

l1. In a chuck, the combination of a fixed supporting means, a work seat rotatable relatively thereto, a work clamping jaw comprising a body portion sustained by the supporting means and movable in the direction ot the axis of rotation and a jaw proper rotatable about said axis relatively to the body portion, and antitriction members between the body portion and the jaw proper.

l2. In a chuck, the combination of a fixed supporting means, a work seat rotatable relatively thereto, a work clamping jaw com prising a body portion sustained by said supporting means and movable in the direction of the axis of rotation and a jaw proper rotatable about said axis relatively to the body portion, and acombined radial and thrust bearing between said body portion and jaw proper.

13. ln a chuck, the combination of a rotatable work seat, a clamping jaw movable to and from the work seat and comprising a Anon-,rotatable `portion and a jaw proper rotatable' with the work, the said non-rotatable portion being formed with a. lateral opening to permit access to the exterior of the work, and an actuating member for moving the clamping jaw to and from the work seat.

14. In a chuck, the combination of a rotatable work seat, a clamping jaw movable to and from the work seat and comprising a non-rotatable portion and a jaw proper rotatable with the work, the said non-rotatable portion being formed with a lateral opening to permit access to the exterior of the work and the jaw proper being provided with an opening to permit access to the interior of the work, and an actuating member for moving the clamping jaw to and from the work seat.

l5. In a chuck, the combination of a work seat, a clamping jaw movable to and from the work seat and comprising non-rotatable axially extending arms spaced circumferen tially from each other an annular member connected with said arms and spaced longitudinally from the work seat and a clamping jaw proper sustained by the annular member, said clamping jaw proper being provided with an axially extending opening through which access may be gained to the interior of the work, the spaces between said arms permitting access to the exterior of the work, and an actuating member for the clamping j aw operable to move the same to and from the work seat.

V16. In a chuck, the combination oi a fixed support, a work seat, a work clamping jaw, said j aw comprising a neck surrounding the iixed support and supported thereby, circumferentially spaced arms extending longitudinally from the neck and annular member connected with the arms and an annular clamping jaw proper supported kby the annular member, whereby access may be gained to the interior of the work through the annular j aw proper, and whereby access may be gained to the exterior of the work between the longitudinal arms, and a jaw actuating member sustained by the fixed supporting means and operatively engaged with the clamping jaw to operate the same.

17. In a chuck, the combination of a frame, a work seat rotatable relatively thereto, a clamping jaw comprising a body portion sustained by the frame and movable relatively thereto in the direction of the axis of rotation and confined against circumferential movement, and a jaw proper movable with the body portion and rotatable relatively thereto about said axis, said body portion being formed with a lateral opening to `permit access to the exterior of the work piece, and said jaw proper being formed with an axially extending opening to permit access to the interior of the Work piece.

supporting frame provided with 18. In a chuck, the combination of a fixed supporting frame, a rotary spindle mounted therein and carrying a work seat, a member surrounding the forward portion of said spindle and supported by said frame to move in the direction of the axis of rotationA Surrounding the forward portion of' said spindle and supported by said frame to move in the direction of the axis of rotation of the spindle, said member carrying a work clamping jaw facing the work seat, and an actuating device for said member sustained .by the frame between the spindle and the surrounding member and operable to move the latter in the direction of said axis. f

20. In a chuck, the combination'of a fired a orwardly extending cylindrical casing, a spindle rotatably mounted in the supporting frame and extending within said casing, said spindle carrying a work seat rotatable with it, a work clamping jaw comprising a body portion surrounding the vcasing and supported thereby to move to and fro in the direction of the axis of rotation and conned against circumferential.movement, and a jaw proper carried by the body portion to act on the work piece and clampthe same against the work seat, an actuating device for the clamping jaw operable to` move the same in the direction of the axis of rotation to and from the work seat, said jaw being movable toward the work seat independently of the actuating device, and

an axially extending tension spring con nected respectively with said ixed supporting frame and with the jaw and acting to urge said jaw toward the work seat.

21. In a work holding device, the combi nation with a rotary spindle provided with a work seat, 'of a xed casing surrounding the spindle rearwardly of the work seat, a jaw having a work engaging portion capable of rotation with the spindle and disposed forwardly of the work seat and cooperative therewith, said jaw having a body portion surrounding said casing and capable of reciprocation thereon` means for preventing the rotation of the body portion of the jaw with the spindle, means active upon the jaw for yieldingly pressing the work engaging portion against a work piece interposed between the saine and the work seat, and means for positively retracting the jaw for clamping the workpiece against the seat.

2Q. In a work holding device, the combination with a rotary spindle, of a casing surrounding the spindle and fast with the bea-ring supporting the same, a vjaw having a body portion surrounding the said casing and capable of reciprocation thereon, said body portion comprising a neck-having a pair of diametrically opposed cam slots each having an enlargement, a sleeve mounted upon said fixed casing and capable of rota- `i tion thereon, rollers mounted on the sleeve and located in the camv slots, the forward end of the spindle being provided with a work seat, and the body portion of the jaw extending forwardly of said work seat andv constituting a housing for a ball bearing,`

a combined radial and thrust ball bearing located therein and a jaw proper carried by the body portion ofthe clamping jaw in 'cooperative relation tothe work seat and to the ball bearing, and elastic means for re-v tracting the body portion of the jaw when the cam rollers are positioned in the enlargey ments 'of the cam slots.

In testimony whereof, I have aiiixed my y signature hereto.

` ROBERT F. RUNGE. 

